Yesterday an Android 4.0 Ice Cream Sandwich build was leaked for AT&T’s Samsung Galaxy S II Skyrocket. On Tuesday, RootzWiki also leaked an Ice Cream Sandwich build for AT&T’s Galaxy S II. You’ll need to have a bit of know-how when it comes to installing the operating system on your device, but we’re certain there are plenty of users over at RootzWiki that can help you if you get caught-up along the way. In any case, upgrade at your own risk — we typically recommend you wait until AT&T officially rolls out the update. Leaks like this typically suggest such a move is imminent.